David S Battisti, University of Washington, Department of Atmospheric Sciences, Seattle, WA, United States, Cristian Proistosescu, University of Washington, JISAO, Seattle, WA, United States, Kyle Armour, University of Washington, Dept. of Atmospheric Sciences and School of Oceanography, Seattle, WA, United States and Gerard Roe, University of Washington, Seattle, Department of Earth and Space Sciences, Seattle, WA, United States